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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '430f5dc00ed70598815263188143f46e00c72e576b6091c827b87b94cd7beb8c' 
  AND token = 'UXX6tta1ZWjHtPzJPAHpehA0jd9KP/dBUEiXXWQCmZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}